public class KeyTest {
    public static void main(String[] args) {
        int a = 18;
        //多行编辑模式：Alt + J，退出多行编辑模式，用Esc
        System.out.println("a = " + a);
        System.out.println("a = " + a);
        System.out.println("a = " + a);
        System.out.println("a = " + a);
        char gender = '男';
        System.out.println(gender);
        System.out.println("性别：" + gender);

        double random = Math.random();
        double num = Math.random();//产生随机数

        //查看函数或方法的参数列表，Ctrl + P，在()里面按
        System.out.println(1);
    }

    public static int add(int a, int b) {
        return a+b;
    }
}
